My boyfriend and I had sex three weeks ago. He came inside and I'm positive he did. I wasn't on birth control and then about a week after sex I started taking birth control.. I need help because if I'm pregnant I need to stop my birth control. I have a weird feeling in my lower abdomen,breats are sore, I don't feel hungry but I know when pregnant you must eat healthy.

If you believe you are pregnant you need to take a pregnancy test, either at home or at your physicians' office. Why would you begin birth control after having unprotected sex? Generally a pill pack notes to start on the first day of your period.